package com.itheima.controller;

import com.itheima.pojo.Result;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.Md5Util;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

// 用户相关接口
@RestController
@RequestMapping("/user")
@Validated
public class UserController {
    @Autowired
    private UserService userService;

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password) {
        // 查询当前用户是否已经注册
        User user = userService.findByUsername(username);
        if (user == null) {
            // 注册用户
            userService.register(username, password);
            System.out.println("新用户："+ username +"---注册");
            return Result.success();
        }else {
            return Result.error("当前用户名已被占用");
        }
    }

    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password) {
        //查询当前用户名是否存在
        User loginUser = userService.findByUsername(username);
        if(loginUser == null){
            return Result.error("当前用户名不存在");
        }
        if (Md5Util.getMD5String(password).equals(loginUser.getPassword())) {
            // 登录成功
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token = JwtUtil.genToken(claims);
            // 存储到redis中
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue(); // 获取操作字符串的模板对象
            operations.set(token,token,1, TimeUnit.HOURS); // 设置token到redis中，有效期1小时
            System.out.println("用户："+ loginUser.getUsername() +"---登录");
            return Result.success(token);
        }
        return Result.error("密码错误");
    }

    @GetMapping("/userInfo")
    public Result<User> info() {
        Map<String,Object> map =ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUsername(username);
        return Result.success(user);
    }

    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){
        userService.update(user);
        return Result.success();
    }

    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl){
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){
        //1.校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");
        if (!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要的参数");
        }
        //2.原密码是否正确
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUsername(username);
        if (!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码错误");
        }
        //3.newPwd和OldPwd是否相同
        if (Md5Util.getMD5String(newPwd).equals(loginUser.getPassword())){
            return Result.error("新密码不能和原密码相同");
        }
        //4.newPwd和rePwd是否相同
        if (!newPwd.equals(rePwd)){
            return Result.error("两次输入的密码不一致");
        }
        //4.更新密码
        userService.updatePwd(newPwd);
        //5.删除redis中的token
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);//删除token
        return Result.success();
    }

}
